单选题The meeting came to ______ at last.

单选题{{B}}Passage Three{{/B}} Sea horses have unusual parents. The female sea horses lay the eggs, but unlike other creatures. It's the males that give birth to the young. Male sea horses have a fold of skin on their bellies that forms a pocket, called a brood pouch. During the breeding season, the sea horse's pouch swells to receive eggs. A female sea horse lays up to 200 eggs at a time in the pouch. Then she swims off, leaving her male partner to care for the developing eggs and give birth to young sea horses. The female will return every day to check on her mate and the eggs, but she doesn't stay long,nor does she take part in the birth. It takes from five to six weeks for the eggs in the male's pouch to develop. During this time the male avoids open water and hides in sea grass. His big pouch makes it difficult from him to swim, so the male often uses his tall to grasp a piece of sea grass. Firmly, gripping the grass, he will stay perfectly still for hours or even days. The male sea horse will change Iris color to blend with his surroundings and avoid being seen by predators who will try to eat him or poke holes in his pouch to get the eggs. The eggs hatch inside the male's pouch. When the babies begin moving around, the mate sea horse knows it's time for them to be born. He grabs a sea grass stem with his tail and begins rocking, bending his body back and forth, this causes the opening to enlarge until wide enough for the first baby sea horse to shoot out. the father sea horse continues rocking, bending, and stretching his body so that the rest of the babies can be born. Sometimes he has to press his pouch against a rock or some stiff seaweed to force the young out. Sea horse babies are born in groups of five or more. Sometimes it takes two days for the father sea horse to give birth to all his young. He is very tiered when it's over. Soon after giving birth to one brood, the male will approach his mat and show her his empty pouch. This tells her he is ready to receive eggs again.

单选题A: Excuse me, I don't want to interrupt you... B. ______ A. No. no. It's quite all right. B. Well. never mind. C. It won't bother me. D. Of course not.

单选题Wife: Honey, we have only one egg and half a bottle of milk in the fridge. Oh, and we are running out of toilet paper... Husband: ______.

单选题It is hard to track the blue whale, the ocean"s largest creature, which has almost been killed off by commercial whaling and is now listed as an endangered species. Attaching radio devices to it is difficult, and visual sightings are too unreliable to give real insight into its behavior. So biologists were delighted early this year when, with the help of the Navy, they were able to track a particular blue whale for 43 days, monitoring its sounds. This was possible because of the Navy"s formerly top-secret system of underwater listening devices spanning the oceans. Tracking whales is but one example of an exciting new world just opening to civilian scientists after the cold war as the Navy starts to share and partly uncover its global network of underwater listening system built over the decades to track the ships of potential enemies. Earth scientists announced at a news conference recently that they had used the system for closely monitoring a deep-sea volcanic eruption (爆发) for the first time and that they plan similar studies. Other scientists have proposed to use the network for tracking ocean currents and measuring changes in ocean and global temperatures. The speed of sound in water is roughly one mile a second—slower than through land but faster than through air. What is most important, different layers of ocean water can act as channels for sounds, focusing them in the same way a stethoscope (听诊器) does when it carries faint noises from a patient"s chest to a doctor"s ear. This focusing is the main reason that even relatively weak sounds in the ocean, especially low-frequency ones, can often travel thousands of miles. (283 words)

单选题 The climate of Earth is changing. Climatologists are confident that over the past century, the global average surface temperature has increased by about half a degree Celsius. This warming is thought to be at least partly the result of human activities, such as the burning of fossil fuels and the clearing of forests for agriculture. As the global population grows and national economies expand, the global average temperature is expected to continue increasing by an additional 1.0~C to 3.5℃by the year 2100. Climate change is one of the most important environmental issues facing humankind. Understanding the potential impacts of climate change for natural ecosystems is essential if we are going to manage our environment to minimize the negative consequences of climate change and maximize the opportunities that it may offer. Because natural ecosystems are complex, nonlinear systems, it follows that their responses to climate change are likely to be complex. Climate change may affect natural ecosystems in a variety of ways. In the short term, climate change can alter the mix of plant species in land ecosystems such as grasslands. In the long term, climate change has the potential to dramatically alter the geographic distribution of major vegetation types—savannas, forests, and climate change can also potentially alter global ecosystem processes, including the cycling of carbon, nitrogen, phosphorus, and sulfur. Moreover, changes in these ecosystem processes can affect and be affected by changes in the plant species of the ecosystem and vegetation type. All of the climate change—induced alterations of natural ecosystems affect the services that these ecosystems provide to humans. The global average surface temperature increase of half a degree .Celsius observed over the past century has been in part due to differential changes in daily maximum and minimum temperatures, resulting in a narrowing of the diurnal temperature range. Decreases in the diurnal temperature range were first identified in the United States, where large-area trends showed that maximum temperatures have remained constant or increased only slightly, whereas minimum temperatures have increased at a faster rate. In this issue, Alward etal. report on the different sensitivities of rangeland plants to minimum temperatures increases.

单选题Only in this way ______ your writing.

单选题No one can be sure if the car on display fits him or her until he or she ______ them.

单选题Roger: Hurry up! We don't have much time left. Dick: ______. We still have two hours. Roger: Come on! This is my first time ever to take a plane. I don't want anything to go wrong.

单选题Private enterprise is the thing. We went to a party on the river earlier this summer. The host (31) is old enough to know better, served a lunch made with his home-made wine. As I was driving, I was (32) to decline, but my wife politely took a glass and subsequently fell upstairs. The wound (33) weekly dressing by the district nurse, a talkative soul who enjoyed the social (34) of her work. She stayed for most of the afternoon, admiring things and gossiping about village life. At about the (35) time I called in the regional crime officer, to advise me on how to make the house reasonably secure against the child criminals who commit most of the (36) in these parts. He, (37) , was a companionable soul and made an afternoon of it. And why is it that when I write to a public utility (38) as the gas board. I get a printed card to tell they received my letter and will shortly act on it? The money spent on printing, typing, filling in and stamping these cards (39) add up to a very large sum indeed, when spread over all these industries. No commercial house sends such acknowledgements. Money, (40) it reaches a public service, loses the value that was stamped on it by the trouble to get it.

单选题Not too many decades ago it seemed "obvious" both to the general public and to sociologists that modern society has changed people's natural relations, loosened their responsibilities to kin (亲戚) and neighbors, and substituted in their place superficial relationships with passing acquaintances. However, in recent years a growing body of research has revealed that the "obviousness" is not true. It seems that if you are a city resident, you typically know a smaller proportion of your neighbors than you do if you are a resident of a smaller community. But, for the most part, this fact has few significant consequences. It does not necessarily follow that if you know few of your neighbors you will know no one else. Even in very large cities, people maintain close social ties within small, private social worlds. Indeed, the number and quality of meaningful relationships do not differ between more and less urban people. Small-town residents are more involved with kin than big-city residents. Yet city dwellers compensate by developing friendships with people who share similar interests and activities. Urbanism may produce a different style of life, but the quality of life does not differ between town and city. Nor are residents of large communities any likelier to display psychological symptoms of stress or alienation, a feeling of not belonging, than are residents of smaller communities. However, city dwellers do worry more about crime, and this leads them to a distrust of strangers. These findings do not imply that urbanism makes little or no difference. If neighbors are strangers to one another, they are less likely to sweep the sidewalk of an elderly couple living next door or keep an eye out for young troublemakers. Moreover, as Wirth suggested, there may be a link between a community's population size and its social heterogeneity (多样性). For instance, sociologists have found that the size of a community is associated with bad behavior including gambling, drugs, etc. Large-city urbanites are also more likely than their small-town counterparts to have a cosmopolitan (见多识广者的) outlook, to display less responsibility to traditional kinship roles, to vote for leftist political candidates, and to be tolerant of nontraditional religious groups, unpopular political groups, and so-called undesirables. Everything considered, heterogeneity and unusual behavior seem to be outcomes of large population size.

单选题Internet shopping is a new way of shopping. Nowadays, you can shop for just about anything from your armchair. All you need is a computer which is linked to the Internet. Shopping on the Internet is becoming increasingly popular. In the United States. people spent over US$2.5 billion on Internet shopping in 1998. This figure is expected to reach USS11 billion by the year 2004. People can shop for a variety of products on the Internet. Physical products include items such as books, CDs, clothes and foods. These types of products are the most common purchases through the Internet. You can also buy information products such as on-line news or magazine stories, or you can download computer software through the Internet. Services such as booking airline tickets, reserving hotels or renting cars are also available on the Internet. You can also go shopping off the Internet for entertainment services and take part in on-line games. Internet shopping offers a number of benefits for the shopper. The most important advantage is convenience. You can shop when you like as the on-line shops are open 24 hours a day and you don't have to queue with other shoppers at the checkout counters. Secondly, it is easy to find what you are looking for on the Internet. Even out-of-print books may be ordered on line. Finally, it is often cheaper to buy goods through the Internet, and you can tell the shop exactly what you want. The main disadvantage of Internet shopping is that you cannot actually see the products you are buying or check their quality. Also, many people enjoy shopping in the city and miss the opportunity to talk to friends. Some people are worded about paying for goods using credit cards, so Internet companies are now finding ways to make on-line payment safe. Internet shopping is sure to become more and more popular in the years ahead. It promises to change the way we buy all kinds of things—from tonight's dinner to a new car.

单选题What is the author's overall attitude toward fridges?

单选题Eye contact is important because wrong contact may create a communication ______ A. barrier B. tragedy C. vacuum D. question

单选题"Old is suddenly in"(Line 1, Par

单选题{{B}}Passage Three{{/B}} It remains to be seen whether the reserves of raw materials in the year 2000 will be sufficient to supply a world economy which will have grown by five hundred percent. Southeast Asia alone will have an energy consumption five times greater than that of Western Europe in 1970. Incidentally, if the underdeveloped countries started using up petrol at the same rate as the industrialized areas, then world reserves would be exhausted by 1990. All this only goes to show just how important it is to set up a plan to conserve and divide up fairly natural resources on a worldwide scale. This is a matter of life and death because world population is expanding at an incredible rate. By the middle of the next century population will expand every year by as much as it did in the first 1,500 years after Christ. In the southern, poor parts of the globe, the figures are enough to make your hair stand on end. Even supposing that steps are taken to stabilize world population in the next fifty years, the number of inhabitants per square kilometer will increase by from 4 in the United States to 140 in South East Asia. What can we do about it? In the first hypothesis we do nothing. By the year 2000, the southern parts of the world would then have a population greater than the total world population today. Alternately we could start acting right now to bring birth rate under control within fifteen years so that population levels off. Even then the population in the southern areas would not stop growing for seventy-five years. And the population would level off at something like twice today's figure. Finally, we could wait ten to twenty years before taking action. If we wait ten years the population of the southern area would stabilize at 3,000 million. Even today the number of potential workers increases by 350,000 people per week. By the end of the century this figure will reach 750,000; in other words, it will be necessary to find work for 40 million people per year--not to speak of food. What this means in practical terms we can scarcely imagine. But clearly if we do nothing, nature will solve the problem for us. But at what cost!

单选题In space, ______ and equipment need many forms of protection.

单选题Speaker A: Oh, I am feeling dizzy now. You know I have just enjoyed much beer. Speaker B: Really? Don"t you know it is a very important party? ______!

单选题Jane: Firstly, allow me to introduce myself. My name is Jane, manager of the company. Tom: ______

单选题A:______ B : Yes, there' s one near the end of the street. It' s behind the church. A. Hello, sir. Where's the bus station? B. Excuse me. Is there a parking lot anywhere around here? C. Excuse me, sir. How can I find the way to the police station? D. Which building is the Department of Immigration, please?